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1. 发明专利

JP2000271695A PRODUCTION OF MAGNESIUM ALLOY MATERIAL 失效
公开(公告)号：JP2000271695A
公开(公告)日：2000-10-03
申请号：JP8426699
申请日：1999-03-26
申请人： YKK CORP , AZUMA KENJI
发明人： KAWAZOE MASATAKA , HASHIMOTO TAKASHI , NAGAHORA JIYUNICHI , AZUMA KENJI
IPC分类号： B21J5/00 , B21J5/06 , C22C21/06 , C22C23/00
摘要： PROBLEM TO BE SOLVED: To provide a method to produce a formed part excellent in a mechanical property, not generating a crack in forming as well as porosity/blister due to gas in a forming die and hardly generating a forming defect, etc. SOLUTION: The plastic deformation corresponding to >=220% of equivalent elongation is imparted to an alloy stock, an average grain size is refined to >=10 μm, an average grain size of an intermetallic compound is refined to

2. 发明专利

JP2000271693A PRODUCTION OF MAGNESIUM ALLOY MATERIAL 失效
公开(公告)号：JP2000271693A
公开(公告)日：2000-10-03
申请号：JP8426099
申请日：1999-03-26
申请人： YKK CORP , AZUMA KENJI
发明人： KAWAZOE MASATAKA , NAGAHORA JIYUNICHI , HASHIMOTO TAKASHI , AZUMA KENJI
IPC分类号： B21J5/00 , B21J5/06 , C22C23/00
摘要： PROBLEM TO BE SOLVED: To provide a magnesium alloy material not causing a crack to the material even in one time side extrusion, capable of refining a grain size in a reduced number of processes and excellent in a mechanical property. SOLUTION: By applying the deformation of a large strain quantity corresponding to >=220% of equivalent elongation to a magnesium alloy material subjected to hot plastic working and refining an average grain of a micro structure to

3. 发明专利

JP2003096549A ALLOY WITH EXCELLENT MECHANICAL PROPERTY AND IMPACT DUCTILITY, AND ITS MANUFACTURING METHOD 审中-公开
公开(公告)号：JP2003096549A
公开(公告)日：2003-04-03
申请号：JP2001291260
申请日：2001-09-25
申请人： AZUMA KENJI , YKK CORP
发明人： AZUMA KENJI , NAGAHORA JIYUNICHI
IPC分类号： B21C23/00 , B21J5/00 , B21J5/06 , C22C23/02 , C22C23/04 , C22F1/00 , C22F1/06
摘要： PROBLEM TO BE SOLVED: To provide, at a low cost, an alloy and a formed article both having excellent mechanical strength, elongation, deformability and high-speed impact energy absorptivity. SOLUTION: When warm plastic working is applied to the alloy, crystals are refined to about

4. 发明专利

JP2000271631A MANUFACTURE OF FORMED MATERIAL AND FORMED ARTICLE BY EXTRUSION 失效
公开(公告)号：JP2000271631A
公开(公告)日：2000-10-03
申请号：JP8416099
申请日：1999-03-26
申请人： AZUMA KENJI , YKK CORP
发明人： KAWAZOE MASATAKA , HASHIMOTO TAKASHI , NAGAHORA JIYUNICHI , CHRISTIAN PITAN , AZUMA KENJI
IPC分类号： B21C23/00 , B21J5/06 , C22F1/00 , C22F1/04 , C22F1/06
摘要： PROBLEM TO BE SOLVED: To provide a manufacturing method of a formed material and formed article by extrusion, which are excellent in working characteristics and to which extrusion forming and cold working are executable, by which the formed material and furthermore the formed article by extrusion are efficiently manufactured and defect in forming is hardly generated. SOLUTION: The material which is obtained by applying plastic deformation (strain), which is equivalent to elongation of >=220% to an alloy base-stock and micronizing an average grain size into

5. 发明专利

JPH09137244A METHOD FOR EXTRUDING ALUMINUM ALLOY AND ALUMINUM ALLOY MATERIAL HAVING HIGH STRENGTH AND HIGH TOUGHNESS OBTAINED BY THE METHOD 失效
公开(公告)号：JPH09137244A
公开(公告)日：1997-05-27
申请号：JP19832496
申请日：1996-07-08
申请人： AZUMA KENJI , YKK CORP
发明人： AZUMA KENJI , NAGAHORA JIYUNICHI , KAWAZOE MASATAKA
IPC分类号： B21C23/00 , B21C23/01 , B21C25/00 , B21C27/00 , C22C21/06 , C22F1/00 , C22F1/047 , C22F1/05
摘要： PROBLEM TO BE SOLVED: To produce an aluminum alloy material having a structure refined into the grain size of =220%, preferably, >=10000% is applied in the extruding stage to refine the average grain size in the microstructure to >=1 micron, by which the high strength and high toughness material can be produced. The extruding stage is executed at less than the recrystallization temp. of the alloy to be used, preferably, at less than the recovering temp.

6. 发明专利

JP2000080407A MANUFACTURE OF FORMED PART 失效
公开(公告)号：JP2000080407A
公开(公告)日：2000-03-21
申请号：JP24973798
申请日：1998-09-03
申请人： YKK CORP
发明人： NAGAHORA JIYUNICHI , TATE HIROKI , SAITO KOJI , ONOKI TERUAKI
IPC分类号： B21C23/22 , B21J5/08 , B22F5/00 , B22F7/06 , B22F9/02 , B22F9/08 , C22C1/04 , C22C1/05 , C22C1/10 , C22C21/00
摘要： PROBLEM TO BE SOLVED: To provide an alloy material combining plural functions such as high strength and wear resistance. SOLUTION: First powder having high strength and rigidity after forming and a second powder having wear resistance and surface hardness after forming are prepared. Subsequently, a forming stock constituted of a base part composed of the first powder and an attendant part composed of the second powder is formed and then, plastic working is applied to the forming stock to manufacture a formed part in which properties in the base part are different from those in the attendant part. As the first powder, rapidly solidified alloy powder or quasi-crystal alloy powder is used. As the second powder, at least one kind selected from Al2O3, Si3N4, BN, SiC, Al4C3, Al8B2O15 and B2O is used or further, these and the first powder or first powder having a composition different from that of the first powder are used.

7. 发明专利

JPH09215791A GOLF CLUB HEAD 失效
公开(公告)号：JPH09215791A
公开(公告)日：1997-08-19
申请号：JP2806096
申请日：1996-02-15
申请人： YKK CORP
发明人： NAGAHORA JIYUNICHI , KITA KAZUHIKO
IPC分类号： A63B53/04 , A63B102/32 , C22C21/00 , C22C45/08
摘要： PROBLEM TO BE SOLVED: To make it possible to form a golf club head to a larger size and from a longer shaft so as to allow a ball to fly more distant by forming at least the face part of the golf club head of an AL alloy contg. a quasi-crystal, thereby forming the golf club head of a lighter and stinger metallic material. SOLUTION: A crown part 2 and a sole part 3 are separated before joining of the respective constituting units of the golf club head. The face part 1 and a hosel part integrally molded and the crown part 2 and the sole part 3 are integrally molded to form a body part. At least the face part 1 is formed of the Al alloy contg. the quasi-crystal. As a result, the deflection of the face part is reduced at the time of hitting the ball and a player is able to carry ball to a longer distance without lowering the initial speed of the ball. Since the club head is light, it is possible to increase the size of the head, the use of a long shaft is made possible and the centrifugal force of the club head at the time of hitting the ball is increased to increase the head speed at the time of hitting the ball and to increase the carry.

8. 发明专利

JP2000343205A MANUFACTURE OF AMORPHOUS ALLOY FORMED STOCK 失效
公开(公告)号：JP2000343205A
公开(公告)日：2000-12-12
申请号：JP15731499
申请日：1999-06-04
申请人： YKK CORP
发明人： NAGAHAMA HIDENOBU , NAGAHORA JIYUNICHI
IPC分类号： B22D21/00 , B22D27/04 , G02B6/38
摘要： PROBLEM TO BE SOLVED: To provide a method capable of forming even a small and long hole with a specified shape, high dimensional accuracy and surface quality, and manufacturing an amorphous alloy formed stock in a simple process and with excellent mass productivity. SOLUTION: A molten metal A of a material to generate an amorphous alloy in a melting container 1 is poured and cast in a cavity 4 of a die 3 which is maintained at the temperature that the die temperature Tm is not lower than the glass transition temperature Tg of the alloy and lower than the melting point Tm. Then, a small wire-like core member 6 is penetrated in a casting material B in a condition that the die temperature Tm is maintained at the temperature not lower than the glass transition Tg, and drawn to form a small hole 7. After the die is cooled until the die temperature is not higher than the glass transition temperature Tg, the die is separated, and an amorphous alloy formed stock 8 is taken out. The core member may be set in the die in advance.

9. 发明专利

JP2000314830A V-GROOVED SUBSTRATE FOR ALIGNING MULTI CORE OPTICAL CONNECTOR AND MULTI CORE OPTICAL FIBER, AND MANUFACTURE THEREOF 失效
公开(公告)号：JP2000314830A
公开(公告)日：2000-11-14
申请号：JP12559399
申请日：1999-05-06
申请人： YKK CORP , NTT ADVANCED TECH KK
发明人： ARAI TOSHIO , TANIGUCHI TAKESHI , NAGAHORA JIYUNICHI
IPC分类号： G02B6/40 , C22C45/00 , C22C45/08 , C22C45/10 , G02B6/00 , G02B6/24
摘要： PROBLEM TO BE SOLVED: To provide an inexpensive V-grooved substrate having an excellent strength, having few wear and slight deformation accompanying repeated attaching and detaching of a guide pin or the like and in which stable low connecting losses are held as an optical connector, and a manufacturing method by which the grooved substrates are manufactured by a single process with excellent productivity. SOLUTION: The V-grooved substrate 1 in which V grooves 2 for alignment positioning optical fibers are formed and which is used for aligning a multi core optical connector and a multi core optical fiber is manufactured from an amorphous alloy having at least a glass transition region and preferably having the glass transition region of temperature width 30 K or more. Especially, M1-M2 base and M1-M2-Ln base amorphous alloy (M1: Zr, Hf, M2: Ni, Cu, Fe, Co, Mn, Nb, Ti, V, Cr, Zn, Al, a, Ln: rare earth element) are suitably used because of having an extremely large range of ΔTx. Such the V-grooved substrate 1 is manufactured by a mold casting method and a die forming method with excellent productivity.

10. 发明专利

JP2000303102A MANUFACTURE OF SOLIDIFIED POWDER, AND DEVICE THEREFOR 失效
公开(公告)号：JP2000303102A
公开(公告)日：2000-10-31
申请号：JP11093199
申请日：1999-04-19
申请人： YKK CORP
发明人： NAGAHORA JIYUNICHI , TATE HIROKI , SAITO KOJI , ONOKI TERUAKI
IPC分类号： B22F3/02 , B30B11/02
摘要： PROBLEM TO BE SOLVED: To produce a solidified powder capable of easily breaking an oxide film, firmly joining powder particles with each other, and maintaining an excellent characteristic of the alloy powder consisting of a non-equilibrium phase. SOLUTION: A stock material M consisting of the powder and/or the powder aggregate formed of a metal or an alloy is arranged in a sealed space, the mode of the sealed space is successively changed in a condition where the forming material is filled, and a shear plastic flow is given to the material to join the powder particles with each other into solidified powder. More specifically, the stock material M is inserted in a storage part 2 in a container 1, and pressed by a first stem 3 and a second stem 4, and the shear plastic flow is given to the stock material M by alternately advancing and retreating a first pressing means 5 and a second pressing means 6.

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